# Match the logic gates in column a with their equivalents in columns B

1.  P-2,Q-4,R-1,S-3

2.  P-2,Q-4,R-1,S-3

3.  P-4,Q-2,R-1,S-3

4.  P-4,Q-2,R-3,S-1.

4
Correct Answer :

P-4,Q-2,R-3,S-1.

Explanation :
No Explanation available for this question

# For the output F to be 1 in the logic circuit shown, the input combination should be

1.  A=1, B=1, C=0

2.  A=1, B=0, C=0

3.  A=0, B=1, C=0

4.  A=0, B=0, C=0

4
Correct Answer :

A=0, B=0, C=0

Explanation :
No Explanation available for this question

# Assuming that all flip-flops are in reset condition initially, the count sequence observed at QA in the circuit shown is

1.  0010111…..

2.  0001011…..

3.  0101111…..

4.  0110100……

4
Correct Answer :

0110100……

Explanation :
No Explanation available for this question

# The Boolean function realized by the logic circuit shown is

1.  F = ∑m(0,1,3,5,9,10,14)

2.  F = ∑m(2,3,5,7,8,12,13)

3.  F = ∑m(1,2,4,5,11,14,15)

4.  F = ∑m(2,3,5,7,8,9,12)

4
Correct Answer :

F =m(2,3,5,7,8,9,12)

Explanation :
No Explanation available for this question

# When the output Y in the circuit below is “1” implies that data has

1.  Changed from “0” to “1”

2.  Changed from “1” to “0”

3.  Changed in either direction

4.  Not changed

4
Correct Answer :

Changed from “0” to “1”

Explanation :
No Explanation available for this question

# The logic function implemented by the circuit below is (ground implies a logic “0”).

1.  F=AND(P,Q)

2.  F=OR(P,Q)

3.  F=XNOR(P,Q)

4.  F=XOR(P,Q).

4
Correct Answer :

F=XOR(P,Q).

Explanation :
No Explanation available for this question

# The output Y in the circuit below is always when

1.  two or more of the inputs, P,Q,R are ”0”

2.  two or more of the inputs, P,Q,R are ”1”

3.  any odd number of the inputs P,Q,R are ”0”

4.  any odd number of the inputs P,Q,R are ”1”

4
Correct Answer :

two or more of the inputs, P,Q,R are ”1”

Explanation :
No Explanation available for this question

# The output of a 3-stage Johnson(twisted-ring) counter is fed to a digital-to-analog (D/A) converter as shown in the figure below. Assume all states of the counter to be unset initially. The waveform which represents the D/A converter output V is

1.

2.

3.

4.

4
Correct Answer :

Explanation :
No Explanation available for this question

# Consider the given circuit In this circuits, the race around

1.  does not occur

2.  occurs when CLK=0

3.  occurs when CLK=1 and A=B=1

4.  occurs when CLK=1 and A=B=0.

4
Correct Answer :

does not occur

Explanation :
No Explanation available for this question

# The output Y of a 2-bit comparator is logic 1 whenever the 2-bit input A is greater than the 2-bit input B. the number of combinations for which the output is logic 1,is

1.  4

2.  6

3.  8

4.  10.

4
Correct Answer :

6

Explanation :
No Explanation available for this question

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